grid image vectorization method based on an improved flooding filling algorithm

The invention relates to a grid image vectorization method based on an improved flooding filling algorithm, and the method comprises the following steps: S10, taking an original image, carrying out the image sharpening of the original image, and obtaining an image containing edge information; S20, clicking an original image, taking the image obtained in the step S10 as a mask, and filling corresponding image blocks through a flooding filling algorithm; S30, repairing the image blocks obtained in the step S20 by using a cavity filling algorithm; S40, according to the image obtained in the stepS30, finding out a coordinate point set of the image block contour by using a Freeman chain code contour tracking algorithm; And S50, according to the coordinate point set obtained in the step S40, thinning the number of the coordinate points by using a polygon fitting algorithm to obtain a key coordinate point set, and orderly drawing connection lines between the key coordinate point set and thekey coordinate point set t